Machine for making braces for cajieiage-tops



UNITED STATES PATENT OFFICE.

BENJAMIN F. HOOPER, OF` BIRMINGHAM, CONNECTICUT,- ASSIGNOR TO ELI N..BALDWIN, OF HUNTINGTON, CONNECTICUT.

MACHINE FOR MAKING BRACES FOR CARRIAGE-TOPS- Specification of LettersPatent No. 32,028, dated April 9, 1861.

To all whom 'it may concern.'

Be it known that I, BENJAMIN F. IIooPER, of Birmingham, New -Havencounty, State of Connecticut, have invented a new and useful Machine forMaking Joints for the Braces of Carriage-Tops, &c.; and I do herebydeclare that the same is described and represented in the followingspecification and accompanying drawings.

The nature of my invention consist-s in a pair of clamping dies whichgrip the bar of iron and hold it, while the end is forged or swaged intothe form required, by a `series of traversing dies, operated insuccession for that purpose.

To enable others skilled in the arts to make and` use myinvention I willproceed to describe its construction and operation, referring to theaccompanying drawings in which the same letters indicate like parts ineach of the figures.

Figure 1, is a plan or top view of the machine. Fig. 2, is a frontelevation. Fig. 3, is an elevation of one end.

A, is a bed or plate made of cast iron in the form shown in the drawingand provided with four legs B, B, and also with a hole or opening in itat C, as shown in Fig. l. The top of this plate A, is provided with twoflanges D, D, made in the form shown in the drawing, and also with threeblocks E, F, and G, made in the form shown in Fig. 1, which blocks andflanges I prefer to cast with and onto the plate A, but may be madeseparate and fastenedon if referred that way. The tops of the flanges D,are connected by the bar H, which should be cast with them and made verystrong.

There are some rabbets I, I, on the inside of the inclined edges of theflanges D, D, for the carriage J, to traverse in which is fitted to therabbets, so as to traverse freely and is held down bythe plates K, K,fastened on the top of the flanges so as to project over the edges ofthe carriage and allow it to traverse when it is operated by the togglelinks Il, L, one ofwhich vibrates on a pin in the bar I-I, and the otheron a pin in the carriage J. These toggle links are vibrated by the slideM, which is made in the form shown and connected to them and is pressedforward by the cam M, on the shaft N, to straighten the toggle, and pushdown the carriage, and this slide is drawn back by the spiral spring M2,fastened to it and to the cap M3, in which the slide M, traverses. Thecam M', is made in the rform shown at Figs. 3 and Ll, and fastened tothe shaft N, which turns in boxes fastened to the plate A, at each endof the opening (l, through which the cams revolve as the shaft is turnedby the pulley or gear O.

The end of the carriage J, is made in the form shown at J and the flangeJ 2, projects from it as shown in the drawings, so that when thecarriage is pushed down there is a rectangular opening J 3, between theend of the carriage and the bed A, and block G, in which opening the bar of iron is clamped, while the oint is made on the end of it, by thesliding dies l, 2, and 3, which are pressed forward in succession in theorder in which they are enumerated for that purpose.

The block G, is made in the form shown in Fig. l, with the arc of acircle in its inner corner as shown by dotted lines, which arc forms aportion of the joint madeon the end of the rod of iron which is heated,and laid on the plate A, by the side of the block Gr, when the carriageJ, is forced down to clamp it fast while the die l, is forced up andbends the end over the corner of the block G, toward the die 2, and asthe die l, is drawn back the die 2, is forced up and upsets the end ofthe rod spreading it into the arc of the circle in the corner of theblock G; and as the die 2, is drawn back the die 3, is forced up toaround the side opposite to the circle or are in the corner of the blockGr, and to make the shoulder in joint shown at P, Fig. 5, and completeit when the, carriage J is drawn back to release the rod so that it maybe taken out with a oint on the end, in the form shown in Fig. 5.

The semicircular plate Q., is fastened to the top of the blocks E, F,and G, to hold the dies down which traverse under it. The die l,traverses between the side of the flange. D, and the block E, and isoperated by the toggle links R, R which are pressed straight by the barS which is pushed forward by the cam S, on the shaft N, and drawn backby the spring S2, sho-wn in the drawing. Y

The die2, traverses between the blocks F, and G, and is operated by thetoggles T, T', which are worked by the bar T2, operated by the cam U,and spring U, shown in the drawing. The die 3 is pushed forward by thecani V, on the shaft N, which acts directly against its rear end thisdie 3, traverses between the blocks E, and F, and in a score in the barW, and is drawn back by the spring V. The bar IV, is fastened to theplate A, to hold the ends of the bars Worked by the cams in place Whilethey are traversed. The several cams are made in the form shown in Figs.3, and 4, of the drawing. The brackets X, X, are fastened to the plateA, to hold the toggle links to the plate While they are vibrated.

The end ofthe flange J2, extends out in the form shown in the drawing`to hold the end of the bar down against the plate A, While it is Workedinto the required shape by the dies.

The block G, and the end of the carriage may be made to tit iron ofdifferent sizes and shapes, as four square, six square, eight square,oval, round, or such other shape as may be desired, and the dies l, 2,and 3, may

be made of such a size and form a's to make the joint in the shaperequired.

The bars Worked by the cams, may be drawn back by yokesaround the cams,or by arms extending into grooves in the sides of the cams, instead ofthe springs.

I believe I have described and represented the machine which I haveinvented for making joints for carriage braces, so as to enable anyperson skilled in the art to make and use it.

I will now state What I desire to secure by Letters Patent, to Wit:

The clamping dies in combination with the sWaging or shaping diesWorking in succession-substantially as described for the purpose setforth.

BENJAMrN F. ,HooPEa IVitnesses DAviD N. GRIFFITHS, IVILLIAM B. VVoosTER.

